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So many people sent this to me (and rightly so), that I just had to share this with you too.

This is from the hightly insightful comic XKCD. I highly recommend subscribing via the XKCD RSS feed.

Medieval Tech Humor

Got to love it...

Welcome to the Petabyte world

There was a time that I actually heard the following.

“Wow, 128 kilobytes? You’ll never use that up!”

I think that was back in the early 80’s. I have wallets that have more hard drive space than that now.

As computers increase in speed, programs require more hard drive space and more computer memory. Moreover, Moore’s Law dictates that the computer processing speeds will double every two years.

So, welcome to the Petabyte Age. While most computer users understand the term “Gigabyte”, and many are familiar with “Terabyte”, Petabyte is just coming into its own.

How much is a Petabyte? Here is some perspective:

1 Byte (8 bits) = 1 word in English

1 Kilobyte (1,024 Bytes) = 1 very short joke

1 Megabyte (1,024 Kilobytes) = 1 small novel (25,000 pages or so)

1 Gigabyte (1,024 Megabytes) = 10 yards of books on a shelf

1 Terabyte (1,024 Gigabytes) = 50,000 trees worth of printed paper
(10 terabytes = the printed collection of the Library of Congress)

1 Petabyte (1,024 Terabytes) = 10 million filing cabinets filled with text

Visit Mozy’s blog on How Much Is a Petabyte for a great set of graphics to put the Petabyte into perspective.

What is bigger than a Petabyte?

1 Exabyte = 1,024 Petabytes
5 Exabytes = All words every spoken by human beings

1 Zettabyte = 1,024 Exabytes
In 2008, America consumed 3.6 Zettabytes of information (mostly my daughter on Facebook)

1 Yottabyte = 1,024 Zettabytes (that’s 1,073,741,824 Petabytes)
1 Yottabyte = one Byte for every star in the universe
7,000 Yottabytes = one Byte for every atom in the human body

Okay, now my brain hurts…

The Puzzle Challenge: Elevator Habits

Every day, when Grant gets home from work, he takes the elevator from the ground floor to the 16^th floor. He then gets out and takes the stairs up the last four floors to his apartment on the 20^th floor.

Why?

Clues: he only does this if he is alone in the elevator. Otherwise, he takes the elevator all the way to the 20^th floor. When he leaves home, he takes the elevator straight from the 20^th to the ground floor, regardless of whether he is alone in the elevator.

Can you solve the puzzle? Email me back with the answer at [email protected] and I'll post the winners, along with the answers on the blog.